Rounded head on hope x2 break pad bolt.!!!!!

The bolt that holds the pads and spring in has rounded. Have tried maul grips, hammering in a torques bit but still can't get the bugger out. Any suggestions? Have thought about cutting it with hacksaw but will still end up having to get the thread out somehow as far as i can see.??

The bolt in question is flush with the caliper. Not really possible to cut a slot and there's no space between the thread and loaded shoulder between which to cut. Come across one before and they can be a really bugger to shift.

OP, it might be worth taking it to a small engineering shop while it's still tidy enough for them to rescue. If you do too much damage, you might make it tricky for them.

Did it round because you used a cheap/wrong size tool or because the thread has seized?

This happened to the main-pivot bolt that holds the suspension rocker in place! I cut a slot in with a dremel and screwed it out with a flat-blade screwdriver Why can't u cut a slot in it? Can you post a pic?

Many thanks for all the suggestions. I used the tools i had at my disposal and after using pliers and grips ended up cutting a slot in with hacksaw and after many attempts to turn with flat head the bugger simply won't turn and now the sides are starting to splay and also Managed to stab my hand with screwdriver so have given up put it all back together and there is enough meat left on pads for one more ride which is tomorrow at Dalby Forest. I will attempt it again next week.

Hammer? Sounds a bit like its rusted in? Try a firm wack from hammer then try flat head screwdriver again. If that doesnt work try heating it up? I dont really know...

Currently restoring a 1985 Yamaha YZ250 and there have been some REALLY stubborn bolts/screws/bearings that have taken some serious tinkering to get out. Me and dad spent one evening removing just 1 bolt on the linkage bearings.....ughhhh.

what about cutting through the bolt in the middle, so the tension will be off the thread and then just unwinding it with some needle nose pliers. Could well work.

This
Worked for me when I had a similar problem
Was still a complete bugger to get out but got it there in the end, needs decent quality needle pliers though
I took the calliper off the bike clamped pliers in a vice and turned the calliper, quarter turn, reposition and repeat, got there eventually

It's quite a small bolt, can't get bolt extractors that small and I wouldn't risk applying too much heat with a blowtorch to an alloy brake calliper